Strong solution of Bromothymol Blue (also known as bromothymol sulfone phthalein, Bromthymol Blue, and BTB) is a chemical indicator for weak acids and bases. In the pH of 6.0 or lower, it is yellow. It changes color between the pH of 6 to 7.6 when it becomes completely blue at the pH 7.6.
This is a prepared solution and is ready for use.
May be used as an acid/ base indicator or as a stain for cell walls or nuclei.

Hematoxylin is a natural dye which is extracted from the heartwood of the tree Haematoxylum campechianum.
Hematoxyline is also known as Hydroxybrasilin or Natural Black 1; CAS#517-28-2; Formula C16H14O6
Very pure, Fine yellow powder. Used to make nuclear stain for histology.

Biuret solution, the blue reagent that turns violet in presence of proteins, and change to pink when combined with short-chain polypeptides. The solution is ready to use. The shelf life is about one year if stored in the dark and in a closed container.

Two part components to make fresh Biuret Solution Reagent. This makes one liter Biuret solution, the blue reagent that turns violet in presence of proteins, and change to pink when combined with short-chain polypeptides. Includes instructions on how to add water.

Ninhydrin (2,2-Dihydroxyindane-1,3-dione) is a chemical used to detect ammonia or primary and secondary amines. When reacting with these free amines, a deep blue or purple color known as Ruhemann’s purple is evolved.
Ninhydrin is most commonly used to detect fingerprints, as amines left over from peptides and proteins (terminal amines or lysine residues) sloughed off in fingerprints react with ninhydrin.

Bromothymol Blue (also known as bromothymol sulfone phthalein, Bromthymol Blue, and BTB) is a chemical indicator for weak acids and bases. In the pH of 6.0 or lower, it is yellow. It changes color between the pH of 6 to 7.6 when it becomes completely blue at the pH 7.6.
1 gram of Bromothymol blue may be used to make 10 liters (3 gallons) of indicator solution.
This product is a high purity powder and requires special procedures to make a solution of it for use. If you are a beginer, order BTB10S that is a ready to use solution of BTB.

Phenolphthalein C20H14O4 is an organic compound used as an acid-base indicator. This compound dissolves poorly in water, and therefore it is typically prepared using alcohol as a solvent.
The indicator has a visual transition interval that is colorless at pH 8.0, pink at 8.5 and red at pH 10.0 .

This is a 2200ppm iodine solution used to test for starch in foods, fruits, papers, adhesives, paints and etc.
It may also be used in chemistry projects and biology projects dealing with iodine and starch.

Cation Exchange Resin is used to replace the magnesium and calcium ions found in hard water with sodium ions. The resin can be recharged by washing it with a solution containing a high concentration of sodium ions (strong salt water).